Waste heat recovery from hot steel slag on the production line: Numerical simulation, validation and industrial test

Tianhua Zhang; Longheng Xiao; Guibo Qiu; Huigang Wang; Min Guo; Xiangtao Huo; Mei Zhang

doi:10.1007/s12613-023-2660-3

Volume 30 Issue 11

Nov. 2023

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Article Navigation > International Journal of Minerals, Metallurgy and Materials > 2023 > 30(11): 2191-2199

Tianhua Zhang, Longheng Xiao, Guibo Qiu, Huigang Wang, Min Guo, Xiangtao Huo, and Mei Zhang, Waste heat recovery from hot steel slag on the production line: Numerical simulation, validation and industrial test, Int. J. Miner. Metall. Mater., 30(2023), No. 11, pp. 2191-2199. https://doi.org/10.1007/s12613-023-2660-3

Cite this article as:

Tianhua Zhang, Longheng Xiao, Guibo Qiu, Huigang Wang, Min Guo, Xiangtao Huo, and Mei Zhang, Waste heat recovery from hot steel slag on the production line: Numerical simulation, validation and industrial test, Int. J. Miner. Metall. Mater., 30(2023), No. 11, pp. 2191-2199. https://doi.org/10.1007/s12613-023-2660-3

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Research Article

Waste heat recovery from hot steel slag on the production line: Numerical simulation, validation and industrial test

+ Author Affiliations

Corresponding authors:
Huigang Wang E-mail: wanghuigang0822@126.com

Mei Zhang E-mail: zhangmei@ustb.edu.cn
Received: 18 January 2023; Revised: 21 April 2023; Accepted: 21 April 2023; Available online: 22 April 2023

Abstract

Abstract

Waste heat recovery from hot steel slag was determined in a granular bed through the combination of numerical simulation and an industrial test method. First, the effective thermal conductivity of the granular bed was calculated. Then, the unsteady-state model was used to simulate the heat recovery under three different flow fields (O-type, S-type, and nonshielding type (Nontype)). Second, the simulation results were validated by in-situ industrial experiments. The two methods confirmed that the heat recovery efficiencies of the flow fields from high to low followed the order of Nontype, S-type, and O-type. Finally, heat recovery was carried out under the Nontype flow field in an industrial test. The heat recovery efficiency increased from ~76% and ~78% to ~81% when the steel slag thickness decreased from 400 and 300 to 200 mm, corresponding to reductions in the steel slag mass from 3.96 and 2.97 to 1.98 t with a blower air volume of 14687 m³/h. Therefore, the research results showed that numerical simulation can not only guide experiments on waste heat recovery but also optimize the flow field. Most importantly, the method proposed in this paper has achieved higher waste heat recovery from hot steel slag in industrial scale.
- hot steel slag;
- calculation and verification;
- industrial tests;
- waste heat recovery

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